Male ornament size as a reliable cue to enhanced offspring viability in the barn swallow.

@article{Mller1994MaleOS,
  title={Male ornament size as a reliable cue to enhanced offspring viability in the barn swallow.},
  author={Anders Pape M\oller},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1994},
  volume={91 15},
  pages={6929-32}
}
Many extravagant secondary sexual characters are assumed to have evolved as a result of female choice, either because they attract females or because they reliably reflect the quality of males. Females mating with the most ornamented individuals with a superior genotype are expected to benefit by producing more viable offspring. A viability advantage associated with mate choice can be demonstrated only if (i) parent ornament size reliably reflects parent viability and (ii) offspring viability… CONTINUE READING